Engraving-machine.



F. C. P. HIRSGHMANN.

ENGRAVING MACHINE. v APPLIOATION FILED numza, 1913.

1,131,379, Patented Mar. 9, 1915.

3 SHEETS-SHEET l.

THE NORRIS PETERS 50., PHOTG-LITHO, WASHINGTON. D. c.

F. G. F. HIRSGHMANN.

ENGRAVING MACHINE.

APPLICATION IILED HAILZB, 191s.

Patented M21119, 1915.

8 SHEETS-SHEET 2.

(ZZZ/ NORRIS PETERS CO1, PHOTO-LITHQ. WASHINGTON, D. C.

F. c; F/HIRSGHMANN. E'NG;RAVING MACHINE. 1,1 31,379.

APE LIOA'TION' TILED MAR. 28, 1913 Patented Mar. 9, 1915 3 SHBETSSHEET 3.

WZZZZJZ/I/A JmR- THE NORRIS PETERS C0.. PHOTYL ru WASHINGTON. D

FREDERICK G. F. HIRSCHMANN, OF INDIANAPOLIS, INDIANA.

ENGRAVING-MACHINE.

Specification of Letters Patent.

Patented Mar. 9, 1915.

Application filed March 28, 1913. Serial No. 757,318.

To all whom it may concern:

Be it known that I, F REDERICK C. F. Hrasormrann, a citizen of the United States, and a resident of the city of Indianapolis, county of Marion, and State of Indiana, have invented certain new and useful Improvements in Engraving-Machines, of which the following is a specification.

My invention relates to improvements in engraving machines and has for its object the provision of an improved machine of this character which will be simple of construction and efiicient in operation.

The invention consists in the combinations and arrangements of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings forming a part of this specification, and in which, v

Figure 1 is a vertical section of a machine embodying my invention, Fig. 2, a top plan view of the same, Fig. 3, a detail view partially in section of a tracing lever employed in the machine, Fig. 4, a horizontal section of the machine with the casing thereof removed, Fig. 5, a detail view showing a construction for adjusting the fulcrum of the tracing lever, Fig. 6, an enlarged transverse section of a ball employed in the fulcrum of the tracing lever, Fig. 7, a transverse section of a work holder employed in the machine, Fig. 8, a transverse section of said work holder taken on line :c-w of Fig. 7 Fig. 9, a top plan view of a supporting plate employed in the machine, Fig. 10, a detail view taken on line yy of Fig. 1, and Fig. 11, a detail view of a clamping block employed in the machine.

The preferred form of construction as illustrated in the drawings comprises a suitable frame or casing 1 having a transverse slot 2 in its top. A tracing lever 3 is mounted to operate in slot 2, said tracing lever being square in cross section and passing loosely through a square hole in a ball a mounted in a fork 5 which is pivoted to an adjusting head 5, said adjusting head 5 being slidably mounted on a guide post 6 as shown. Head 5' is rendered adjustable by means of a threaded shaft 7 passing therethrough and threaded therein, said shaft being provided at its upper end with a bevel gear 8 meshing with a bevel gear 9 on an adjusting shaft 10 extending to one side of the machine. This adjusting shaft 10 is provided with a hand wheel 11 to faclhtate operations thereof. Ball 1 is provided with a plurality of pairs of diametrically arranged pivot holes 12 which are adapted to be engaged by pivot pins in fork 5 to permit of adjusting the angularity of lever 3 and consequently the slant of letters traced with the machine as will be understood. At its upper end lever 3 is provided with a downwardly turned portion I l and a tracing point 15 is carried by said downwardly turned portion so as to be free for vertical reciprocation. A guide member 16 is secured to the top of casing 1 in position to assist member 16 to guide the operator in tracing by associating a pattern therewith.

At its lower end lever 3 is pivotally connected with the fork 3' which in turn is pivoted to a floating plate 18, said plate being provided at its corners on its under side with ball races 18 as shown. A base plate 19 is arranged at the bottom of frame 1 and is provided with ball races 20 registering with ball races 18 and adapted to contain balls 21. By this arrangement plate 18 is given a floating bearing for universal movement in any direction.

A lever 22 has its lower end pivotally connected with a fork 23 which in turn is pivotally connected with the rear of plate 18 thus causing a universal connection with said plate. Lever 22 is formed in two telescoping sections which are square in cross section and said lever passes loosely through a ball 24 similar to ball 4 and similarly pivoted in a fork 25 pivotally connected with adjusting block 26. The pivotal connections between forks 5 and 25 and head 5' and block 26 are identical and are fully shown in Fig. 10, such a connection being formed between each of the members 5 and 25 and the corresponding members 5 and 26 as indicated. Adjusting block 26 is adjustably mounted on a guiding and supporting post 26' as shown in Fig. 1. At its upper end lever 22 is given a universal joint connection 27 with the bottom of a floating work holder plate 28 which is mounted for universal movement on balls 29 in the same manner as plate 18 is mounted upon plate 19. Another work holder plate 31 is given a dove-tail connection 32 with plate 28 and a cross feed screw 33 is swiveled in plate 28 and is threaded in a nut 34 on the bottom of plate 31. Another work holder plate 35 is given a dove-tail connection 36 with plate 31 at right angles to the connection between plate 31 and plate 28 and a cross feed screw 37 is provided for adjusting plate 35 relatively to plate 31 in the same manner as screw 33 adjusts plate 31 on plate 28. A T-shaped clamping block 38 is slidably mounted in a slot 39 at the top of plate 35 and a cross feed screw 40 is mounted in said slot and engages said clamping block 38 to adjust the same in said slot as will be readily understood. Clamping block 38 is made in two parts the lower of which only is threaded and operated by spring held pins 38 to release said screws when desired. Plate 35 is provided at its forward edge with a clamping stop or wall 41 which coiiperates with clamping block 38 to secure the work to be engraved on plate 35. By this arrangement it will be observed that work may be readily mounted on or removed from said plate 35 and said work may be adjusted in any desired direction by means of one of the screws 33 or 37.

At the rear supporting plate 30 is provided with a supporting bracket 42 and a guide rod 43 is mounted in said bracket parallel with the rear edge of the work holder and extending the full width thereof. A V-shaped guide bar 44 is also mounted on bracket 42 parallel with rod 43 as shown. A frame 45 is slidably mounted on rod 43 'and guide 44 and is provided with a set screw 46 for securing it in adjusted positions. A marking lever 47 is pivoted at 48 in the outer portion of frame 45 and is provided with a marking point 49 arranged in operative relation with the work holder plate 35. A second lever 50 is pivoted at 51 in frame 45 and is arranged with its forward end resting upon rearward portion 52 of lever 47 as shown in Fig. 7. At its rear end lever 50 is connected with a suitable cord 53 which extends over guide rollers 54 and 55 to a treadle 56 as shown in'Fig. 1. By this arrangement it will be observed that by depressing treadle 56 cord 53 will be drawn downwardly and the forward end of lever 50 will be elevated to release lever 47 and permit point 49 to fall and contact with work on work holder plate 35. Thus when tracing point 1.5 is caused to trace over a pattern held against guide member 16, work holder plate 35 and consequently the work thereon will be caused to move in unison with tracing point 15 and the pattern will be traced or reproduced on the work on said work holder plate. The speacific form of construction disclosed will be found to be simple in operation and highly elficient in use.

When it is desired to draw straight lines on the work on work holder plate 35, cable 153 is detached and set screw 46 loosened to permit frame 45 to slide freely on rod 43 and bar 44. The marking point 49 is then permitted to come into contact with the work by depressing the rear end of lever 50 with the finger whereupon the straight lines may be drawn by drawing frame 45 along on rod 43 and bar 44. The Work may then be shifted by means of point 15 and a line drawn parallel with the first mentioned line on either side thereof.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. 1, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a machine of the class described the combination of a universally mounted member; a vertically positioned lever mounted to slide longitudinally in said member; a tracing point carried by said lever; a work holder; a marking member in operative connection with said work holder; and an operative connection between said lever and said work holder, substantially as described.

2. In a machine of the class described, the combination of a member arranged to swing on two different horizontal axes; a vertically positioned lever mounted to slide longitudinally in said member and having its upper end turned downwardly; a tracing point carried by said downwardly turned end; a member mounted to float upon balls; a pivotal connection between the lower ends of said lever and said floating member; a movable work holder; an operative connection between said work holder and said floating member; and a marking member in operative relation with said work holder, substantially as described.

In a machine of the class described,-the combination of a member arranged to swing on two different horizontal axes; a vertically positioned lever mounted to slide longitudinally in said member and having its upper end turned downwardly; a tracing point carried by said downwardly turned end; a member mounted to float upon balls; a pivotal connection between the lower ends of said lever and said floating member; a movable work holder; an operative connection between said work holder and said floating member; a marking member in operative relation with said work holder; and means for throwing said marking member into and out of operative relation with said work holder, substantially as described.

4. In a machine of the class described the combination of a universally mounted memher, a vertically positioned lever mounted to slide longitudinally in said member and having its upper end turned downwardly; a tracing point mounted for vertical reciprocation relatively to said downwardly turned end; a work holder operatively connected with said lever, and a marking member in operative relation with said work holder, substantially as described.

5. In a machine of the class described the combination of a universally mounted member, a vertically positioned lever mounted to slide longitudinally in said member and having its upper end turned downwardly; a tracing point mounted for vertical recipro cation relatively to said downwardly turned end; a work holder operatively connected with said lever; a marking member in operative relation with said work holder, and means for throwing said marking member into and out of operative relation with said work holder, substantially as described.

6. In a machine of the class described the combination of a universally mounted member, a vertically positioned lever mounted to slide longitudinally in said member and having its upper end turned downwardly; a tracing point mounted for vertical reciprocation relatively to said downwardly turned end; a member mounted to float upon balls and pivotallv connected with the lower end of said lever; a second vertically positioned lever pivotally connected at its lower end to said floating member, said lever being fulcrumed intermediate its ends, and being formed 01 two telescoping sections; a work holder mounted for universal movement in a horizontal plane and operatively connected with the upper end of said second lever; and a marking member in operative relation with said work holder, substantially as described.

7. In a machine of the class described the combination of a universally mounted memher, a vertically positioned lever mounted to slide longitudinally in said member and having its upper end turned downwardly; a tracing point mounted for vertical reciprocation relatively to said downwardly turned end; a member mounted to float upon balls and pivotally connected with the lower end of said lever; a second vertically positioned lever pivotally connected at its lower end to said floating member, said lever being fulcrumed intermediate its ends, and being formed of two telescoping sections; a work holder mounted for universal movement in a horizontal plane and operatively connected with the upper end of said second lever, a marking member in operative relation with said work holder; and means for throwing said marking member into and out of operative relation with said work holder, substantially as described.

8. In a machine of the class described the combination of a universally mounted member, a vertically positioned lever mounted to slide longitudinally in said member and having its upper end turned downwardly; a tracing point mounted for vertical reciprocation relatively to said downwardly turned end; a member mounted to float upon balls and pivotally connected with the lower end of said lever; a second vertically positioned lever pivotally connected at its lower end to said floating member, said lever being fulcrumed intermediate its ends, and being formed of two telescoping sections; a work holder mounted for universal movement in a horizontal plane and operatively connected with the upper end of said second lever; and a marking member in operative .relation with said work holder, substantially as described.

9. In a machine of the class described the combination of a universally mounted member, a vertically positioned lever mounted to slide longitudinally in said member and having its upper end turned downwardly; a tracing point mounted for vertical reciprocation relatively to said downwardly turned end; a member mounted to float upon balls and pivotally connected with the lower end of said lever; a second vertically positioned lever pivotally connected at its lower end to said floating member, said lever being fulcrumed intermediate its ends, and being formed of two telescoping sections; a work holder mounted for universal movement in a horizontal plane and operatively connected with the upper end of said second lever, a marking member in operative relation with said work holder; and means for throwing said marking member into and out of operative relation with said work holder, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FREDERICK C. F. HIRSCHMANN.

Witnesses:

ALBERT FRELE, CHARLES C. PETTIJOHN.

(opies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

